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Commit 42a698f4 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

amd-iommu: print ivhd information to dmesg when requested 



Add information about devices belonging to an IOMMU as described in the
IVRS ACPI table to the kernel log if amd_iommu_dump was specified on the
kernel command line.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 9c72041f

arch/x86/kernel/amd_iommu_init.c

+73 −0
Original line number Diff line number Diff line
@@ -598,32 +598,83 @@ static void __init init_iommu_from_acpi(struct amd_iommu *iommu, 
	p += sizeof(struct ivhd_header);

	end += h->length;





	while (p < end) {

		e = (struct ivhd_entry *)p;

		switch (e->type) {

		case IVHD_DEV_ALL:



			DUMP_printk("  DEV_ALL\t\t\t first devid: %02x:%02x.%x"

				    " last device %02x:%02x.%x flags: %02x\n",

				    PCI_BUS(iommu->first_device),

				    PCI_SLOT(iommu->first_device),

				    PCI_FUNC(iommu->first_device),

				    PCI_BUS(iommu->last_device),

				    PCI_SLOT(iommu->last_device),

				    PCI_FUNC(iommu->last_device),

				    e->flags);



			for (dev_i = iommu->first_device;

					dev_i <= iommu->last_device; ++dev_i)

				set_dev_entry_from_acpi(iommu, dev_i,

							e->flags, 0);

			break;

		case IVHD_DEV_SELECT:



			DUMP_printk("  DEV_SELECT\t\t\t devid: %02x:%02x.%x "

				    "flags: %02x\n",

				    PCI_BUS(e->devid),

				    PCI_SLOT(e->devid),

				    PCI_FUNC(e->devid),

				    e->flags);



			devid = e->devid;

			set_dev_entry_from_acpi(iommu, devid, e->flags, 0);

			break;

		case IVHD_DEV_SELECT_RANGE_START:



			DUMP_printk("  DEV_SELECT_RANGE_START\t "

				    "devid: %02x:%02x.%x flags: %02x\n",

				    PCI_BUS(e->devid),

				    PCI_SLOT(e->devid),

				    PCI_FUNC(e->devid),

				    e->flags);



			devid_start = e->devid;

			flags = e->flags;

			ext_flags = 0;

			alias = false;

			break;

		case IVHD_DEV_ALIAS:



			DUMP_printk("  DEV_ALIAS\t\t\t devid: %02x:%02x.%x "

				    "flags: %02x devid_to: %02x:%02x.%x\n",

				    PCI_BUS(e->devid),

				    PCI_SLOT(e->devid),

				    PCI_FUNC(e->devid),

				    e->flags,

				    PCI_BUS(e->ext >> 8),

				    PCI_SLOT(e->ext >> 8),

				    PCI_FUNC(e->ext >> 8));



			devid = e->devid;

			devid_to = e->ext >> 8;

			set_dev_entry_from_acpi(iommu, devid, e->flags, 0);

			amd_iommu_alias_table[devid] = devid_to;

			break;

		case IVHD_DEV_ALIAS_RANGE:



			DUMP_printk("  DEV_ALIAS_RANGE\t\t "

				    "devid: %02x:%02x.%x flags: %02x "

				    "devid_to: %02x:%02x.%x\n",

				    PCI_BUS(e->devid),

				    PCI_SLOT(e->devid),

				    PCI_FUNC(e->devid),

				    e->flags,

				    PCI_BUS(e->ext >> 8),

				    PCI_SLOT(e->ext >> 8),

				    PCI_FUNC(e->ext >> 8));



			devid_start = e->devid;

			flags = e->flags;

			devid_to = e->ext >> 8;
@@ -631,17 +682,39 @@ static void __init init_iommu_from_acpi(struct amd_iommu *iommu, 
			alias = true;

			break;

		case IVHD_DEV_EXT_SELECT:



			DUMP_printk("  DEV_EXT_SELECT\t\t devid: %02x:%02x.%x "

				    "flags: %02x ext: %08x\n",

				    PCI_BUS(e->devid),

				    PCI_SLOT(e->devid),

				    PCI_FUNC(e->devid),

				    e->flags, e->ext);



			devid = e->devid;

			set_dev_entry_from_acpi(iommu, devid, e->flags,

						e->ext);

			break;

		case IVHD_DEV_EXT_SELECT_RANGE:



			DUMP_printk("  DEV_EXT_SELECT_RANGE\t devid: "

				    "%02x:%02x.%x flags: %02x ext: %08x\n",

				    PCI_BUS(e->devid),

				    PCI_SLOT(e->devid),

				    PCI_FUNC(e->devid),

				    e->flags, e->ext);



			devid_start = e->devid;

			flags = e->flags;

			ext_flags = e->ext;

			alias = false;

			break;

		case IVHD_DEV_RANGE_END:



			DUMP_printk("  DEV_RANGE_END\t\t devid: %02x:%02x.%x\n",

				    PCI_BUS(e->devid),

				    PCI_SLOT(e->devid),

				    PCI_FUNC(e->devid));



			devid = e->devid;

			for (dev_i = devid_start; dev_i <= devid; ++dev_i) {

				if (alias)